Yes, that's the equation of the plane through (3, 4, -1) and perpendicular to 2i- 3j+ 6k. You can't write a line in 3 dimensions in just one equation. Write it in parametric equations:
x= x0+ at, y= y0+ bt, z= z0+ ct where (x0, y0, z0) is a point on the line and ai+ bj+ ck is a vector in the direction of the line.